from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To fix in the mind; instill.
  • transitive v. Linguistics To insert (a morphological element) into the body of a word.
  • n. Linguistics An inflectional or derivational element appearing in the body of a word. For example, in Tagalog, the active verb sulat "write” can be converted to a passive, "written,” by inserting the infix -in-, yielding sinulat.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To instill.
  • v. To insert a morpheme inside an existing word.
  • n. A morpheme inserted inside an existing word, such as -i- and -o- in English. This adds additional meaning or alters the meaning of the morpheme it is inserted into.

from the GNU version of the Collaborative International Dictionary of English

  • n. Something infixed.
  • n. An element that is inserted into the body of an elemt which it threby modifies, as a letter within a word.
  • transitive v. To set; to fasten or fix by piercing or thrusting in.
  • transitive v. To implant or fix; to instill; to inculcate, as principles, thoughts, or instructions.

from The Century Dictionary and Cyclopedia

  • To fix or fasten in; insert forcibly; implant firmly: as. to infix a dart; to infix facts in the memory.
  • To insert additionally or accessorily. See infix, n.
  • n. Something infixed; in grammar, an element having the value of a suffix or a prefix, but inserted in the body of a word, as practised in some languages.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an affix that is inserted inside the word
  • v. put or introduce into something
  • v. attach a morpheme into a stem word


from The American Heritage® Dictionary of the English Language, 4th Edition

Back-formation from Middle English infixed, stuck in, from Latin īnfīxus, past participle of īnfīgere, to fasten in : in-, in; + fīgere, to fasten.

from Wiktionary, Creative Commons Attribution/Share-Alike License

Back-formation from Middle English infixed, stuck in, from Latin infixus, past participle of infigere, to fasten in.


  • An infix operator is an operator that is expressed using a mathematical notation called infix notation.

    Managed World

  • It is one of the only, if not the only words, that can be used as an "infix" "Fanfuckingtastic".

    I couldn't be more proud.

  • An English teacher would tell you an 'infix' is a word more rarely an entire phrase inserted in the middle of another word to modify it.

    MMO Language as a Power-up

  • FYI, you can define symbolic functions in F# to use the 'infix' notation by prefixing them with a tilde:

    Managed World

  • The infalible result of any inovation now made in 'the Farmer's Boy', would infix in the mind of Mr L the deepest and the most rooted dislike to me. —

    Letter 69

  • I wonder if you actually pronounce the infix as you wrote it here.

    Hillary: "I Will Be Making No Decisions Tonight"

  • In what follows, we shall sometimes write the symbol that denotes a mathematical relation in the usual ˜infix™ notation; for example, ˜™ denotes the greater-than relation in the expression ˜x

    Frege's Logic, Theorem, and Foundations for Arithmetic

  • But one attraction of a DSL is that it's writable by non-programmers -- domain experts who can't be asked to grok the subtleties of why the infix plus operator didn't need a dot, but the must_be operator did.

    Scala over Ruby

  • It's confusing calling some methods as infix, and some as prefix.

    Ruby over Scala

  • Since a-Epenthesis, for example, is based on Jens Rasmussen's published contributions (i.e. his *O-infix hypothesis), you need to first confront the data he uses to support it (and which is in part supporting my reinterpretation of his rule).

    Precising on a new rule to explain Pre-IE word-final voicing


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  • "It's gonna be legend—wait for it, and I hope you're not lactose intolerant because the second half of that word is—dairy!" – Barney, How I Met Your Mother

    July 14, 2009